
小兴安岭3种槭树不同生长期叶性状变异及相关性分析
彭仲韬, 郭嘉兴, 王艺璇, 王磊, 金光泽, 刘志理
南京林业大学学报(自然科学版) ›› 2024, Vol. 48 ›› Issue (1) : 131-139.
小兴安岭3种槭树不同生长期叶性状变异及相关性分析
Variation and correlation analysis of leaf traits of three Acer species in different growth periods in the Xiaoxing’an Mountains of northeast China
【目的】叶性状对植物资源获取、光合能力等起重要作用。本研究分析植物通过叶性状的调整以适应不同生长期的生存策略。【方法】以小兴安岭3种典型槭树:花楷槭(Acer ukurunduense)、青楷槭(A. tegmentosum)和五角枫(A. pictum subsp. mono)为研究对象,在展叶期(6月初)、叶稳定期(7月中旬)和叶凋落期(9月初)3个时期分别测定比叶面积、叶干物质含量、叶绿素含量及叶厚4个叶性状,分析叶性状的生长动态以及性状间的相关性。【结果】在不同生长期,3种槭树的叶性状均发生了显著变异,且随生长期变化存在相似的变异规律,展叶期的叶厚和叶稳定期的叶干物质含量显著高于其余两个时期。叶性状间的相关关系随生长期不同发生了显著变化。3种槭树在展叶期选择“快速投资-收益”型策略,在叶稳定期和叶凋落期则偏向于“缓慢投资-收益”型策略。叶性状及其相关性在不同树种间也存在显著差异。【结论】植物可通过叶性状变异及调整叶性状间的相关关系来适应生长期的变化,并最终形成不同的生存策略。
【Objective】 Leaf traits play important roles in plant resource acquisition and photosynthetic capacity. Therefore, plants can adapt to different leaf-growth periods by adjusting their leaf traits. 【Method】Acer ukurunduense, A. tegmentosum and A. pictum subsp. mono, three typical Acer species in the Xiaoxing’an Mountains of northeast China were selected as the objects of the study. During the three growth periods of leaf expansion (early June), leaf stabilization (mid-July), and leaf senescence (early September), the specific leaf area, leaf dry matter content, chlorophyll, and leaf thickness were measured. Additionally, the growth dynamics of the leaf traits and the correlations between traits were analyzed. 【Result】 Significant differences existed in leaf traits among different Acer species in different growth periods, and the leaf thickness in the leaf expansion period and leaf dry matter content in the leaf stabilization period were significantly higher than the other two periods. The correlation between leaf traits varied significantly with different growth periods. Three Acer species exhibited the “quick investment-return” strategy in the leaf expansion period and the “slow investment-return” strategy in the leaf stabilization and leaf senescence periods. Leaf traits and their correlations were significantly different at the species level. 【Conclusion】Plants adapt to different growth periods through leaf trait variations and different combinations of leaf traits, and finally form various survival strategies.
槭树 / 比叶面积 / 叶干物质含量 / 叶绿素 / 叶厚 / 生存策略 / 小兴安岭
Acer species / specific leaf area / leaf dry matter content / chlorophyll / leaf thickness / survival strategy / Xiaoxing’an Mountains
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